// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/containers/adapters.h"

#include <vector>

#include "testing/gtest/include/gtest/gtest.h"

namespace {

TEST(AdaptersTest, Reversed)
{
    std::vector<int> v;
    v.push_back(3);
    v.push_back(2);
    v.push_back(1);
    int j = 0;
    for (int& i : base::Reversed(v)) {
        EXPECT_EQ(++j, i);
        i += 100;
    }
    EXPECT_EQ(103, v[0]);
    EXPECT_EQ(102, v[1]);
    EXPECT_EQ(101, v[2]);
}

TEST(AdaptersTest, ReversedArray)
{
    int v[3] = { 3, 2, 1 };
    int j = 0;
    for (int& i : base::Reversed(v)) {
        EXPECT_EQ(++j, i);
        i += 100;
    }
    EXPECT_EQ(103, v[0]);
    EXPECT_EQ(102, v[1]);
    EXPECT_EQ(101, v[2]);
}

TEST(AdaptersTest, ReversedConst)
{
    std::vector<int> v;
    v.push_back(3);
    v.push_back(2);
    v.push_back(1);
    const std::vector<int>& cv = v;
    int j = 0;
    for (int i : base::Reversed(cv)) {
        EXPECT_EQ(++j, i);
    }
}

} // namespace
